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|
{-# OPTIONS -fno-warn-tabs #-}
-- The above warning supression flag is a temporary kludge.
-- While working on this module you are encouraged to remove it and
-- detab the module (please do the detabbing in a separate patch). See
-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#TabsvsSpaces
-- for details
module SPARC.CodeGen.Amode (
getAmode
)
where
import {-# SOURCE #-} SPARC.CodeGen.Gen32
import SPARC.CodeGen.Base
import SPARC.AddrMode
import SPARC.Imm
import SPARC.Instr
import SPARC.Regs
import SPARC.Base
import NCGMonad
import Size
import Cmm
import OrdList
-- | Generate code to reference a memory address.
getAmode
:: CmmExpr -- ^ expr producing an address
-> NatM Amode
getAmode tree@(CmmRegOff _ _)
= do dflags <- getDynFlags
getAmode (mangleIndexTree dflags tree)
getAmode (CmmMachOp (MO_Sub _) [x, CmmLit (CmmInt i _)])
| fits13Bits (-i)
= do
(reg, code) <- getSomeReg x
let
off = ImmInt (-(fromInteger i))
return (Amode (AddrRegImm reg off) code)
getAmode (CmmMachOp (MO_Add _) [x, CmmLit (CmmInt i _)])
| fits13Bits i
= do
(reg, code) <- getSomeReg x
let
off = ImmInt (fromInteger i)
return (Amode (AddrRegImm reg off) code)
getAmode (CmmMachOp (MO_Add _) [x, y])
= do
(regX, codeX) <- getSomeReg x
(regY, codeY) <- getSomeReg y
let
code = codeX `appOL` codeY
return (Amode (AddrRegReg regX regY) code)
getAmode (CmmLit lit)
= do
let imm__2 = litToImm lit
tmp1 <- getNewRegNat II32
tmp2 <- getNewRegNat II32
let code = toOL [ SETHI (HI imm__2) tmp1
, OR False tmp1 (RIImm (LO imm__2)) tmp2]
return (Amode (AddrRegReg tmp2 g0) code)
getAmode other
= do
(reg, code) <- getSomeReg other
let
off = ImmInt 0
return (Amode (AddrRegImm reg off) code)
|
